Angular velocity sensor device

Details Angular velocity sensor device Angular velocity sensor device

2006-02-21

2006-02-21

Chapman, John E. (Department: 2856)

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

Reexamination Certificate

active

07000471

ABSTRACT:
An angular velocity sensor device includes a switch (S1) for selecting a first or second driving signal mutually opposite in phase applied to driving electrodes (D1, D2) to oscillate a weight part (8) in a first direction. An adding circuit (29) adjusts the amplitude of the driving signal selected and adds it to a monitor signal reflecting the oscillating state of the weight part (8). A noise signal component appearing in the output signal of the adding circuit (29) is adjusted to a minimum and the output signal is supplied as a feedback signal to a self-oscillating circuit (27) for reducing the noise signal influence on the oscillating drive of the weight part.

REFERENCES:
patent: 6490924 (2002-12-01), Kato et al.
patent: 2001/0037682 (2001-11-01), Komaka et al.
patent: 2002/0073780 (2002-06-01), Katsumata et al.
patent: A-2002-162228 (2002-06-01), None
patent: A-2002-267450 (2002-09-01), None

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